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Finding the Fourth Proportional to 259,715.70, 389,573.55 and 218,381.40

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Solution

The fourth proportional to 259,715.70, 389,573.55 and 218,381.40 is: 327,572.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,715.70 : 389,573.55 = 218,381.40 : x
  2. Step 2: Convert to fraction form
    259,715.70/389,573.55 = 218,381.40/x
  3. Step 3: Cross multiply
    259,715.70x = 389,573.55 × 218,381.40
  4. Step 4: Simplify right side
    259,715.70x = 85,075,617,251.97
  5. Step 5: Solve for x
    x = 85,075,617,251.97/259,715.70
  6. Step 6: Final answer
    x = 327,572.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.